Does smoking affect sperm?

Impact of Smoking on Sperm and Semen Quality

Studies1 on male smoking have shown a decrease in the quality of semen. How does smoking affect sperm? Men who smoke have decreased sperm concentration, decreased motility (how sperm swim), fewer normally shaped sperm, and increased sperm DNA damage.

How do you make homemade Modge podge? How do you make homemade Modge podge?...
Can humans evolve to fly? Can humans evolve to fly? Virtually impossible. To even begin to evolve in that direction, our species would need to be subject to some sort of selective pressure that would favour the development of proto-wings, which we're not....
How many layers of Mod Podge should I use? How many layers of Mod Podge should I use? You can use two or more coats depending on the type of affect you are trying to achieve. If you want a soft smooth surface with no ridges, apply at least 5 to 6 coats....
At what age do boys start liking girls? At what age do boys start liking girls? In terms of an 'average' age, it seems to be 11 for girls and 12 for boys. But don't worry about averages… who wants to be average, anyway! Furthermore, even if his body says he is ready, intellectually, his mind might not...
What is the fastest way to cure Mod Podge? What is the fastest way to cure Mod Podge? Set a timer for 5 minutes (I use my phone), place the craft on a flat non-metal surface, and go over the surface of the craft slowly with a hairdryer set to medium speed and high heat. I personally leave off...
What does the Bible says about personal hygiene? What does the Bible says about personal hygiene? Jesus said to him, “The one who has bathed does not need to wash, except for his feet, but is completely clean. And you are clean, but not every one of you.” “The person to be cleansed must wash their clothes, shave...